package gui.lesson04;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class DialogDemo extends JFrame{
    public  DialogDemo(){
        this.setVisible(true);
        this.setSize(700,500);
        //关闭窗口
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        //JFrame 放东西容器
        Container contentPane = this.getContentPane();
        //绝对布局
        contentPane.setLayout(null);
        //按钮
        JButton button = new JButton("点击弹出一个对话框");
        button.setBounds(30,30,200,50);
        //点击这个按钮的时候，弹出一个对话框
        button.addActionListener(new ActionListener() {//监听器
            @Override
            public void actionPerformed(ActionEvent e) {
                //弹窗
                new MyDialogDemo();
            }
        });
        contentPane.add(button);
    }
    public static void main(String[] args) {
        new DialogDemo();
    }
}
class MyDialogDemo extends JDialog{
    public MyDialogDemo(){
        this.setVisible(true);
        this.setBounds(100,100,400,200);
        //用来关闭弹窗，但是这里不用，有自带关闭功能
//        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        Container container = this.getContentPane();//JFrame 放东西容器
        container.setLayout(null);//绝对布局
        container.add(new Label("张老师带你学java"));
    }
}